﻿using System;

//继承
namespace InheritanceApplication {
    class Shape {
        public void setWidth(int w) {
            width = w;
        }
        public void setHeight(int h) {
            height = h;
        }
        protected int width;
        protected int height;
    }

    // 派生类
    class Rectangle : Shape {
        public int getArea() {
            return (width * height);
        }
    }

    class RectangleTester {
        static void Main(string[] args) {
            Rectangle Rect = new Rectangle();

            Rect.setWidth(5);
            Rect.setHeight(7);

            // 打印对象的面积
            Console.WriteLine("总面积： {0}", Rect.getArea());
            Console.ReadKey();
        }
    }
}